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Science Final > Structure and Forces > Flashcards

Structure and Forces Flashcards

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1
Q

What are structures

A

An object with a definite shape or size and serves a specific purpose or function

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2
Q

3 types of structures

A

Mass
Frame
Shell

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3
Q

What is a Mass structure

A

a structure that is made by pilling a lot of materials on it with no inside

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4
Q

What is a Frame structure

A

a structure that is made by using good materials to build a skeleton and building walls around it.

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5
Q

What is a Shell structure

A

a structure that is made by using few materials to build a shell around to make cover, used to containers.

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6
Q

Disadvantages and advantages of mass structure

A

Disadvantage- very expensive, uses a lot of material, cannot go inside

Advantage- very sturdy

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7
Q

Disadvantages and advantages of frame structure

A

Disadvantage-not as stable as a mass structure

advantage-uses less materials, can go inside

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8
Q

Disadvantages and advantages of shell structure

A

Disadvantage-one small mistake breaks the entire structure

Advantage-cheap, not a lot of materials

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9
Q

3 examples of a mass structure

A

Beaver Dam
Apple
Brick wall

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10
Q

3 examples of a frame structure

A

House, Skeleton, Mushroom

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11
Q

3 examples of a shell structure

A

Leaf, Balloon, Container

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12
Q

What is Aesthetics

A

Appealing to the human eye to get someone to buy it. Making it look good.

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13
Q

Saftey

A

Making sure the margin of saftey meets its requirements to make sure it doesn’t break without knowing.

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14
Q

Cost

A

Making sure you are using materials that are good for the cost of the structure.

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15
Q

Materials

A

Making sure the materials are sturdy and won’t break fast.

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16
Q

What is a composite material

A

A material using 2 layers

ex. concrete and steel rods

17
Q

What is a layered material

A

A material using many layers like a car windshield

18
Q

What is woven materials

A

twisting 2 materials together to make them stronger

ex. shoe laces

19
Q

Mobile vs Rigid joints

A

Mobile can move the joints

Rigid cannot move the joints

20
Q

5 types of Rigid joints

A 
Fasteners ex. bolts
Interlocking shapes ex. lego
ties ex. thread
Adhesives ex. glue
melting ex. welding and soldering
21
Q

Welding vs Soldering

A

Welding is melting metals together

Soldering is adding an extra layer of metal around the other metals and melting it together.

22
Q

Mass vs Force

A

Mass is the gravitational pull on you to the Earth measured in Newtons

Force is what you are made up of measured in Killograms or Grams

23
Q

How is Mass measured

A

Using Balance

24
Q

How is weight measured

A

Using a Scale

25
Q

What is force

A

A push or pull or anything
that causes a change in the
shape or motion of an
object.

26
Q

External vs Internal Forces

A

External a force from the outside of the structure

Internal a force from the inside of the structure

27
Q

What are the 4 Internal Forces?

A

Shear
Tension
Torison
Compression

28
Q

Describe each Internal Force

A

Shear - ripping ( ripping paper )
Tension - pulling ( pulling a rubber band )
Torison - twisting ( twisting a wet towl )
Compression - squishing ( stepping on carpet )

29
Q

Dead load vs Live load

A

Dead load is the weight of the structure

Live load is the weight of objects inside the structure

30
Q

4 ways materials fail

A

Shear
Torison
Compression/bend
Metal Fatigue

31
Q

Describe each ways materials fail

A

Shear- weight of building causing the soil to shear
Torison- twisting can lead structures to break apart and become tangled
Compression/bending- a tin can will break or fold up when its compressed
Metal fatigue- When metal breaks from rust or too much weight on it

32
Q

3 Ways designers design structures

A

Distribute the load through the structure
Direct the forces along angled components
Shape parts to withstand the different forces

33
Q

Difference between Pillings and Footings

A

Pillings are meant for buildings and they are just a straight line down to reach bedrock.

Footings are meant for houses and they are an upsidedown T to hit bedrock.

34
Q

Difference between loadbaring walls and partial walls

A

Loadbaring walls take the load of the structure

Partial walls make up rooms in the structure and don’t hold any load

35
Q

What is Spin Stabilization

A

When something is spinning it will stay up but when its not it will fall down. Like a bike

Science Final (4 decks)

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